94 3.8 v6 mustang number 6 cylinder loading up on gas
 

I have a 94 mustang with the 3.8 liter v6 that is loading up on gas on the number 6 cylinder only. i have replaced the fuel pressure regulater thinking that it may be bad through talking to a couple of mechanics, but it didn't get rid of my problem. i am wandering if it is the fuel injector or if there is something else causing this problem. if any body has any suggestions on fixing the problem or has had this problem before please give me some suggestions.
thanks